On March 10, 2024, the song "U21" was released by Billy77. The duration of U21 is about two minutes long, specifically at 2:17. This song does not appear to have any foul language. U21's duration is considered a little bit shorter than the average duration of a typical track. Since U21 only contains only one song in the album, we like to consider this song as a single. Based on our statistics, U21's popularity is not that popular right now. The overall tone is very danceable, especially with its high energy, which produces more of a euphoric, cheerful, or happy vibe.

U21 テンポ

With U21 by Billy77 having a テンポ of 130 with a half-time of 65 テンポ and a double-time of 260 テンポ, we would consider this track to have a Allegro (fast, quick, and bright) tempo marking. Because of this, we believe that the song has an overall fast tempo. Looking at the テンポ of this song, this song might go great with walking. The time signature for this track is 4/4.

U21 キー

E♭ Major is the music key of this track. Or for those who are familiar with the camelot wheel, this song has a camelot key of 5B. So, the perfect camelot match for 5B would be either 5B or 6A. While, 6B can give you a low energy boost. For moderate energy boost, you would use 2B and a high energy boost can either be 7B or 12B. Though, if you want a low energy drop, you should looking for songs with either a camelot key of 5A or 4B will give you a low energy drop, 8B would be a moderate one, and 3B or 10B would be a high energy drop. Lastly, 2A allows you to change the mood.